ADI LTC1338CSW#TRPBF

The LTC1338 is a 5-driver/3-receiver RS232 transceiver with very low supply current. In the no load condition, the supply current is only 500μA. The charge pump only requires four 0.1μF capacitors. In SHUTDOWN mode, the supply current is further reduced to 0.2μA. In RECEIVER ALIVE mode, all three receivers are kept alive and the supply current is 50μA. All RS232 outputs assume a high impedance state in SHUTDOWN and with the power off. The LTC1338 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120k baud with a 2500pF, 3kΩ load. Both driver outputs and receiver inputs can be forced to ±25V without damage, and can survive multiple ±10kV ESD strikes.

• Low Supply Current: 500μA
• 0.2μA Supply Current in SHUTDOWN
• 50μA Supply Current in RECEIVER ALIVE Mode
• ESD Protection Over ±10kV
• Operates from a Single 5V Supply
• Uses Small Capacitors: 0.1µF
• Operates to 120k Baud
• Three-State Outputs Are High Impedance When Off
• Output Overvoltage Does Not Force Current Back into Supplies
• RS232 I/O Lines Can Be Forced to ±25V Without Damage
• Flowthrough Architecture

• Battery-Powered Modems
• Battery-Powered DCE
• Notebook Computers
• Palmtop Computers